100% and high quality Color: Silver(As pictures show) Dimension: 127*50mm/5*1.97 inch(Approx) How to use ? Remove the four-wheel positioning sensor (fixture), remove the tire. Suck the Magnetic Gauge on the side of the brake wheel carefully. Adjustment the Magnetic Gauge to zero. Install on the required positioning of special parts. Use special tools to adjust the positioning parts to the required measurement angle, with the help of the Magnetic Gauge degree. If you find a little deviation when you retest, just need to fine-tuning at the bottom of the car(Generally a little deviation does not cause positioning failure) Package content: Package included: 1*Magnetic Gauge Tool(Screw color random )